Setting up a new wiki server for MediaWiki, I see that I am getting email notification messages for emails (on my watchlist) when I edit the page. This should not happen - it should only happen when someone else edits the page.
Furthermore, I get an email each time they edit the page. This is also incorrect: it should only happen after their first edit and then I should not receive any emails until I view the changed page.
Does anyone know what is happening? I don't see anything about this in the manual.
Update: this directly contradicts the documentation. (Note: this link is documentation for an extension but the text is correct: this is core functionality.)
Update 2: the MediaWiki version is 1.15.4.
And it seems only to be happening to administrators.
Solved: my mistake; I was using CategoryWatch. Blush.